Hi,
We are integrating an eDP panel on Android 12 (Linux 5.15.52), and although the relevant drivers have probed successfully, the panel still cannot be turned on. The same panel can be turned on on Android 9 (Linux 4.14.98). When comparing Linux 4.14.98 to Linux 5.15.52, there are significant differences in the DRM subsystem.
1. Is eDP panel supported on Android 12 (Linux 5.15.52)? If supported, can you provide an DTS example for eDP panel for Linux 5.15.52?
2. following is the current error log:
[ 2.941516][ T1] cdns-mhdp-imx 32c00000.hdmi: __cdns_dp_probe
[ 2.941570][ T1] cdns-mhdp-imx 32c00000.hdmi: lane-mapping 0xc6
[ 2.964509][ T1] cdns-mhdp-imx 32c00000.hdmi: DP FW alive check done
[ 3.032239][ T1] imx-dcss 32e00000.display-controller: bound 32c00000.hdmi (ops cdns_mhdp_imx_ops [cdns_mhdp_imx])
[ 3.046591][ T1] [drm] Initialized imx-dcss 1.0.0 20190917 for 32e00000.display-controller on minor 0
...
[ 6.068826][ T169] [drm] Initialized vivante 1.0.0 20170808 for 38000000.gpu3d on minor 1
...
[ 13.642016][ T381] cdns-mhdp-imx 32c00000.hdmi: [drm:cdns_mhdp_mailbox_validate_receive [cdns_mhdp_drmcore]] Hmmm spurious mailbox data maybe, cleaning out...1:2:130 vs 1:2:2
[ 13.658193][ T381] cdns-mhdp-imx 32c00000.hdmi: [drm:cdns_mhdp_get_edid_block [cdns_mhdp_drmcore]] *ERROR* get block[0] edid failed: -22
[ 13.671010][ T381] [drm:cdns_dp_connector_get_modes [cdns_mhdp_drmcore]] *ERROR* Invalid edid
...
[ 18.863552][ T318] cdns-mhdp-imx 32c00000.hdmi: [drm:cdns_mhdp_mailbox_validate_receive [cdns_mhdp_drmcore]] Hmmm spurious mailbox data maybe, cleaning out...1:3:6 vs 1:3:5
[ 18.879132][ T318] [drm:cdns_dp_bridge_mode_set [cdns_mhdp_drmcore]] *ERROR* Failed to get caps -5
[ 19.168542][ T318] cdns-mhdp-imx 32c00000.hdmi: Wait PLL Ack failed
[ 19.677573][ T318] cdns-mhdp-imx 32c00000.hdmi: [drm:cdns_mhdp_train_link [cdns_mhdp_drmcore]] *ERROR* training failed: -110
[ 19.689005][ T318] cdns-mhdp-imx 32c00000.hdmi: [drm:cdns_mhdp_train_link [cdns_mhdp_drmcore]] *ERROR* Failed to start training -110
[ 19.701115][ T318] cdns-mhdp-imx 32c00000.hdmi: [drm:cdn_dp_bridge_enable [cdns_mhdp_drmcore]] *ERROR* Failed link train -110
Thanks!
